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128 Hybrid-Renewable Energy Systems in Microgrids
are used to derive the equations. Given Eqs. (7.41) and (7.42), they can be rewritten in
terms of sequence power as:
P + P − P + P −
I = + I , = − (7.46)
IpL=P+v++P−v−,IpS=P+v+−P−v− pL v + v − pS v + v −
Q + Q − Q + Q −
I = + I , = − (7.47)
IqL=Q+v⊥++Q−v⊥−,IqS=Q+v⊥+−Q−v⊥− qL + − qS + −
v ⊥ v ⊥ v ⊥ v ⊥
Figure 7.6 Short-circuit response of VSI with flexible positive- and negative-sequence
power control (current limited). (A) k p = 1, k q = 1. (B) k p = 0.5, k q = 1. (C) k p = 0, k q = 1.
(Voltage: V; Current: A; Power: kW/kvar).
